Furnace



(No Model.) 3 Sheets-Sheet 1. G. M. CONWAY. FUR'NAGB. No. 520,035.Patented May 22, 1894.

(No Model.) 3 Sheets-Sheet 2. G. M. CONWAY. FURNAGB.

Patented May 22,1894.

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G. M. CONWAY. Plumm:l

' Patented May 22, 1894. Y

UNITED STATES PATENT OFFICE.

GEORGE M. CONWAY, OF MILWAUKEE, VISCONSIN.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 520,035, dated May 22,1894.

Application filed June 10,1893 Serial No. 477,209. (No model.)

To a/ZZ whom, t may concern:

Be it knownthat I, GEORGE M. CONWAY, a citizen of the United States, anda resident of Milwaukee, in the county of Milwaukee, and in the State ofWisconsin, have invented certain new and useful Improvements inFurnaces; and I do hereby declare that the following is a full, clear,and exact description thereof.

My invention relates to furnaces and consists in certain peculiaritiesof construction, as will be fully set forth hereinafter, andsubsequently claimed.

In the drawings: Figure l is a vertical longitudinal section through myimproved furnace, on the line I-l of Fig. 2. Fig. 2 is a front elevationof the same with boiler front, front wall, and grate removed, and withparts broken away, or in section, to show details of construction. Fig.3 is a plan view of the parts shown below the line 3 3 in Fig. l, withportions broken away. Fig. 4 is a detail sec` tional view on the linei-i of Fig. 2. Figs. 5 to 9, inclusive, are detail views of tiles orbricks employed in said furnace. Fig. IO is a detail view illustratingthe construction of the air-fine casing and damper. l

A, Fig. l, represents the boiler front with suitable smoke arch door a,and below this at a the opening for the furnace door leading to thegrate B, and still lower down, an opening 'a2 for the passage of thedamper rod C, said rod being notched as at c c, adJacent to its handleend, for adjustable engagement with a latch-plate a3 at this point, andbelow is the door a4 of the ash-pit L.

D is the throat of the chimney-pipe.

E is the brid ge-wall at the rear of the grate, between the side walls FF of the structure. This bridge-wall has a rounded top on the arc of acircle struck from the center of the boiler above, as shown in Figf.,and, in the present illustrations there are shown two airflues G G(though the number may be more or less, as desired) communicating at topwith the transverse arc-shaped air-space H extending between the saidside-walls F F. The lower mouths of the described air-fines G are iittedwith damper-casings I to which the dampers are att-ached, as bestillustrated in Fig. l0. From the upper part of each casing, thereprojects an ashj shield v., below which at each side, are lugs 'L' c',and between these parts is located the damper-shaft j cast solidly withthe damper J, and secured in place by pins i2, as shown, and having oneend outside of its bearings, squared 0E as shown at j to fit within acorresponding opening in one end of the crank-arm c whose other end ispivotally attached to the inner end of the damper-rod C. By these means,a movement of the handle of the said rod C, in or out, will vary theposition of the said damper J, which can thus partially or wholly close,or open, the month of the air-flue G, and keep the said damper in thedesired position by dropping one of the notches c over the latch-plate0.3.

If ashes and other refuse matter accumulate in the air-flue G, these canbe readily removed by raising up and fastening the damper J at itshighest point, and introducing a long handled hoe through the ash-pitdoor a4, and this is a great convenience in construction over thefluedampers in common use.

Resting on the arc-shaped top of the bridgewall E, are a series of thetiles or bricks M, N, of peculiar construction, illustrated by thedetail views Figs. 5, 8 and 9. These tiles are transversely rounded ontheir upper and lower surfaces, (to conform to the described shape Ytiles INI, as shown in Figs. l and 4, and con-l verge upward from thispoint of contact to their outer ends, and are furthermore formed with right-angled shoulders n', in their sides, coinciding with the describedshoulders m4 of the tiles M.

O P represent other tiles (shown in Figs. 7 and 6, respectively) which tin the described shoulders m4 n of each of the adjacent pairs of tiles MM and N N when the latter are ad'-V justed to place on top of thebridge-wall as best shown in Fig. 2. The tile O is shown as a plainrectangle, but the tile P has a vertical inner end passagejp and abovethis a rightangled shoulder p', the said passage p communicating withthe described openings m3 in the tiles M M. When desired, the tiles M Nmaybe made in one piece, as may the tiles O P, but for convenience ofmanufacture and application, I prefer to make them separately, as shown,in which shape, further, they are more convenient for storage andtransportation.

Q Q represent the top tiles and these are made with right-angledshoulders q q in their side edges to interlock with the top edges of thetiles O P, as best shown in Fig. 2, these tiles Q being rounded on theupper and under surfaces, so that, when put together in use, they mayconform to the arc of a circle struck from the common center of theboiler above, from which the arc line of the tiles M N was struck, theradially disposed tiles O P being held firmly in place between saidupper and lower series of tiles. These tiles Q are of uniform width andsize,but at each end of the radius the end tiles (marked Q Q are ofproper width toimpinge against the side-walls F F and need only thedescribed shouldersq on their inner sides.

R represents a horizontal tubular boiler of ordinary construction,supported in the usual manner, by brackets (not shown) resting upon theside walls, and independent of the described radial line of tilingbelow.

The operation of my described furnace is as follows: The fuel is placedupon the grate B, and when properly ignited the gases liberatedtherefrom pass into the chambers formed by the tiles M N O P Q, and ontheir passage therethrough they are supplied with air, which enters thedamper controlled mouths of the air-dues G, passes into the arcshapedair-space H, and from thence along through the grooves fm n, and upthrough the openings m and m2 into the bottom ot' the describedchambers, and up through the openings m3, passage p, and shoulderedopenings p, into the upper part of said chambers, as shown by thearrows, in Figs. il and 2. The tiles forming the said chambers becomeheated, in the operation of the furnace, and the air from the air-tluesG is heated in its described passage through the said grooves, passagesand openings and when coming into contact with the gases liberated fromthe fire-bed, is forced to mingle therewith by the contraction of thechambers caused by the described convergence of the tiles N, forming apractically perfect combustion of said mingled gases and heated air asthey pass out of the contracted throats of the chambers, therebyreducing the smoke nuisance to a minimum, and by this process ofelimination of smoke, the heating properties of the fuel are increased,instead of being descreased by such elimination as is the case with theold methods commonly employed. The gases, now practically free fromsmoke, pass along the bottom of the boiler, returning through the tubesthereof and up and out through the chimney. By the nearly perfectcombustion and elimination of smoke described there is practically nodeposit of soot upon the heating surfaces, and they are therefore alwaysin proper condition for absorbing the heat of the passing gases.

My described damper plays an important part in effecting the desiredresult, as it is necessary, in order to obtain perfect combustion thatthe carbonaceous matter in the liberated gases should mingle with air ofa proper temperature, and if there is any excess of air admitted, thetemperature will at once be lowered, as only a certain quantity of aircan be properly heated in agiven time by its passage against and intothe heated tile chambers described, and hence the need of regulating theadmission of air at the airtlue mouth.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a furnace, the combination with a bridge-wall, provided withdamper-controlled air-liues and a transverse air-space communieatingtherewith, of a series of gas and air mingling and combustion chamberscommunicating with said air-space, and with'each other, said chambersbeing open at each end, the inlet opening of each chamber being of fullheight, and the outlet opening converging to a contracted throat.

2. In a furnace, the combination with a bridge-wall, provided withdamper-controlled air-flues, and a transverse air-space communicatingtherewith, of aboiler, and a series of gas and air mingling andcombustion chambers, radially disposed about said boiler, and interposedbetween it and said airspace, said chambers communicating with saidair-space, and with each other, and being open at each end, the inletopening of each chamber being of full height, and the outlet openingconverging to a contracted throat.

3. In a furnace the combination with a boiler, of a series of gas andair mingling and combustion chambers, composed of sections of tiles, thebottom tiles being rounded and grooved on their under surfaces, and thetop tiles rounded on their upper surfaces in conformity with the shapeof said boiler, and ra.- dially disposed about the same,'the upper andlower tiling being separated by a series of partition plates formingtherewith the said chambers, and there being air passages throughthebottom tiles and partitions for the admission of air within saidchambers.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of Tisconsin, in thepresence of two witnesses.

GEGRGE M. CONXVAY.

Vitnesses:

H. G. UNDERWooD, HENRY DANHERT.

IOO

